Sear-control means for firearms



Sept. 27, 1949. CROCKETT SEAR-CONTROL MEANS FOR FIREARMS 2 Sheets-Sheet1 Filed Sept. 2, 1948 Patented Sept. 27, 1949 SEAR-CONTROL MEANS FORFIREARMS Harry L. Crockett, New Haven, Conn., assignor to OlinIndustries, Inc.', New Haven, Conn., a

' corporation of Delaware Application September 2, 1948, SerialNo.47,361

The present invention relates in general to firearms, and, moreespecially, to sear-control means by which the's'ear may be stoppednormally after releasing the firing-means but which will permitadditional displacement'of the sear for the purpose of withdrawing theaction from the chamber of the receiver.

An object of the invention is to provide a superior sear-control devicefor firearms which is inexpensive to manufacture and simple and reliablein operation.

A further object'of the invention is to provide an improved sear-controldevice for bolt action firearms wherein the device has the multiple functions of a sear-stop, a bolt-stop control-means, and means for latchinga box-magazinein'the frame of the firearm."

Claims.

With the above and other objects in'view, as I will appear to thoseskilled in the art from the present disclosure, this invention includesall features in the said disclosure which are novel over the prior art.

In the accompanying drawings, in which certain modes of carrying out thepresent invention are shown for illustrative purposes:

Fig. 1 is a broken side elevation of a bolt-action firearm embodying theimproved sear-control device of this invention, the stock and associatedparts of the firearm being omitted;

Fig. 2 is a broken side elevation in sectionof the firearm, similar toFig. 1, and showing the action arm includes, in brief, a receiver ID oftubular form, into the forward end of which the rear end of a barrel IIis threaded or otherwise secured. The receiver [0 is also provided withan axial bolt-receiving passage I 2, the forward upper portion of whichis intersected by a transverse loading-and-ejection opening l3.

Mounted in the bolt-receiving passage l2 of the receiver NJ withcapacity for reciprocation therein is a cylindrical bolt l4 providedwith a longitudinally-axia1 firing-plunger guideway [5 which isintersected at its forward end by a relativelysmall eccentricfiring-point passage l6. Projecting through the passage I6 is the firingpoint I! formed at the forward end of a firing-plunger 18, the latterbeing mounted in the guide-passage l5 in the bolt I 4, with capacity,for reciprocation therein relative to said bolt.

The rear portion of the breech-bolt I4 is reduced in diameter in themanner characteristic of firearms ofthis type, to provide a smoothcylindrical exterior surface upon which turns a boltoperating sleeve l9having a laterally-offset operating-handle 20 terminating in a ball-grip2|. The bolt-operating sleeve I9 is adapted to beheld.

in place upon the reduced rear-end portion of the closed andthefiring-pin-held in cocked position by the sear, the improvedsear-control device serving as a latch to hold the box-magazine in theframe of the firearm;

Fig. 3 is a broken side elevation in section, similar to Fig. 2, butshowing the sear-stop defiected 'fromits normal position by the searwhichhas been pulled downwardly out of the path of the bolt so as topermit withdrawal thereof from the receiver;

Fig. 4 is a perspective view of the sear-andtrigger unit;

Fig. 5 is a perspective view of the improved sear-control device of thisinvention; and

Fig. 6 is a-perspective view of the box-magazine frame of the firearm.

The improved sear-control device of this invenfully in the CrockettPatent No."2,174,971 of October 3, 1939.

Referring especially to Figs. 1 and 2, the fire bolt M by means of aretaining sleeve 22 which is mounted upon the reduced rear-end portionof the bolt and secured in place thereon by a transverse retaining-pin23.

The reduced rear-end portion of the bolt is provided with an axialaperture 24 constituting an extension of the aperture 15 of the bolt foraccommodating a helical firing-spring 25 which bears at its forward endagainst the rear end of the firing-plunger I8 and at'its rear endagainst an end-plug 26 secured in the rear end of the axial aperture 24by the aforesaid transverse pin 23. The main portion of thefiring-plunger I8 is substantially plate-like and is provided at itsrear guide-projection 28 which extends through a lon- I gitudinal slotin the bottom wall of the reduced portion of the breech-bolt, theguide-projection 28 having, in turn, a downwardly-extending lug '29-which is adapted to project into operative engagement with a cam-slot 30formed in the bolt- 7 operating sleeve l9.

Formed on the underside of the firing-plunger I8 is a forwardly-facingcocking-shoulder 3| which is adapted to be engaged by a rearwardly- Thefiring-plunger I8 is also formed facing cocking-shoulder 32 formed uponthe upwardly-projecting comb 33 of the sear-arm 34 of a sear-and-triggerunit, indicated generally by the numeral 35. Referring especially toFig. 4, the sear-and-trigger unit 35 includes, in addition to thesear-arm 34, a trigger-arm 36 which depends from the rear end thereofsubstantially perpendicular thereto and-terminates at its =lowerend in acurvedctrigger or finger-apiece 31; andrza safety-slide 38 mounted forlimited longitudinal movement on the underside of the sear-arm 34.5 Tothis end, the rear end of thesafetkSlideisi slotted longitudinally, asindicated'at 39? to formtwo laterally-spaced guide-fingers 46 -451; the;

inner edges of which are adapted jtorrideairrsuite '15-:-

able guide-grooves 4 l4l formed at the intersection of the trigger-arm36 with the Sean-arm, 34. The forward end of the safety-slide is heldagainst the underside of the sear-arm 34 by the head-42 of a screw, theshank of which extends freely throughg-a:.1ongitudinal slot 43=of thesafety -slide. and,,is secured in the; underside of, :the sear-arm.-34=,. A verticalslot. 44 isgforrnedin rone-ofthe guide fingers of.thersafety slide and-is :adapted" toreceive the depending-efinger .45 ofa,manuallyoperable safety-slide operating-tarm- 46-1 pivotally mountedon the pivotzepina ll-of.the seareande triggerunit, 35 lhereinabovedescribed; The fonwardrend ,of; the 1safety-slide 38ds provided withadown:tunned,lip .48awhich by manual movier-nent.- of the-operating arm46,,is,adapted;to b,emoved into and; from engagementfiw-ithy-a-,-shoulder: of abox-magazine if rame,.-as vand'fori the purpose hereinafter ;des(;:ri loed. v The 'forwaiid enda of thesear-- arm- 34 1sprovided with a ,-forward1yextending; nose 49,,z-theunderside-50@ofewhichconstitutes a: substantiallyhorizontal-bearinggsurf ace adapted to rest uponthegupper,endnofr;a';sear=sp17ing,-.5l' which, is: adiustablymounted-,ina a vertical aperture; in, the rear end of the aforementionedboxmagazine frameand, provides the; force for-yieldingly holding the=rearwardlyr-facingr; cooking; I shoulder $2 of the :sear-comb' 33ineeng r fimentz. with ,the vforwardly-vf-aoingecocking shouldep 3lofthe springeloaded firing,- .plunger I 8.1:

Ingthis connection, -it-wi1l1beinoted that theforward end of' thesear-arm34 and specifically the sear-comb 33 and: Sear-nose. 49aregsupported 1' within-a vertical slot 52'.! in ,the underside, of-,11he receiver for movement thereinit to; en a e the cocking-eshoulder32.-;-0f the sear comb :33 with and to disengage ,it from:thezcocking-shoulder SI .of the firing plunger.

The particularfirearmshownherein:is;-adapted to ba rovidedwi h a ,b W -maZinB; and this; end-the iunderside of -;the receiversis; provided 1:with; a second: :vertical slot-i531 ,forwardly of I the, slot- 52 i and--interseeting; the bolt-passage -l 2 of the receiver; Mounted-onthegundersidemf-the receiver -=and; ,opposite its ,-s10ta53,,-- is abox-magae zine frame; indicated-;generally-at 54 ineiFig. n6,- for:l-releasably supporting a box-magazine 55.x The: latter isofconventional construction em bodying substantially-flat side-,plates56::-56 and arcua te front rand-rear end walls 551(- and 53:respectively joined to-theside-plates, the, front and 4 rectangularblock divided into front-end and rearend portions 64 and 65 respectivelyby a boxmagazine receiving-aperture 66 formed vertically in theright-hand side of the frame, the forward and rearward walls 61 and 68respectively of the aperture 66 sloping downwardly and forwardly toconform to the curvature of the front and rear end walls 51-and- 58:respectively-*of the (box-magazine: ,55, the "curved: Wall's ofhtheiaperture being formed with longitudinal ribs 69 and 10 respectively, forengaging in the respective channels 61 ,and,6 2 of the box-magazine. Thefront end -64of' the'frame 54 is notched on its underside, asiiashowtn'especially Well in Figs. 1 and 2, and::istprovidediiwith a verticalaperture H for accommodating-an: assembly-screw 12 adapted to secure.the, front end, of the frame to the underside of the receiver, with thevertical apertuneififiii'ofuthe frame in alignment vertically with theslot 53 in the bottom of the receiver for accommodating the :upper:enditof-rthe boxemaga ne. The -;-re ar:endpprtione65 ofthe.-fr.ame- 54jisaalso 2* provide d twith; aa :vertioal: aperture -1 3 tOwI'GBGiVErran" assembly-screw] May which the rear-lendrportion ofrthe aframe. issecured; to, the. underside of--v the. receiver immediately grearwardly;ofeitss vex: tical aperture 53. In thissconnectiont ili'will bes; notedthat the, upper;surface:of :the framerflr-is for-med with a.-slightly-ooncaveecylindrical faceof revolution; the asurvature 10fwhi(decor-ree-- so i,-

rear walls being-set inwardlyysl-ightly of the front and rear: edges 59: and 63 respectively of thesideplates; 56;-.56-, soiaswto formchannels-6 I and 62.- Apair of subs.tant ially rectangular notches 63.are formed ring-the oppositely-disposed edges,-66 of-thechannel 62 foraccommodatingglugsvof-the-bore magazine, latching-means hereinafterdescribed. Referringdmparticular to Fig-t. (i -the, box magazine 7 frame54 comprises-ta.- substantially-g sponds to the curvature oftheunderside of the? receiver, so. that:the framelmaygmake a snug: fittherewithwhenassembled thereonrbygthascrews 12 and T4:

li -longitudinal clearance-rreccssflhis provided? in thelupperwsurfaceiof the frame; the; clearance:- recess being substantiallU-shapediin-rcross :Sece' tion at its :intersectiom withzthe ma-mend:ofithe frame, and the zbottomrof ther-recesssslopingmps-- wardly .-andr-fonwardly 1 from its .rintersectiom w-ith the rearend ,of thez fnama;toi-intersect the :upper concave surface thereof Formed in thezupyvardw1y,-sloping:bottom frthe;clearancearecess l5 is-a substantiallyJeI-tioal internally-threadech; aper- -tture 16 which isadaptedato-laccommodateeanead justi-ngescrewa ll whichinxlturmi.supports the aforementioned-sean-spring 5 l: intthefaperture:16 'e with its upper, end inx engagement: with the-under; side 50 ofthe sear=nose-49e In .this connectiomita will -be-notedthatatheeclearanoeereeess 5| 5 of, the

frame-is immediately opposite theyvertical slot 52- in the: underside of-.the,receiv.er.-whichr accommoedatestthe sear-noses. 49 ofe the:sear-.and-triggere unit 35.-=

Cooperatively associated withpthe .boxernaga-- zine-and-theseareandetrigger-nmitrof {the firearm is the sea-mcontroltmeanslofpthisinventions-which? serves both as; aesearestop'and; as az-latch forre:leasably securing -;the- :box magazine :im thecframe Ofi-the firearm-n.The sear-control mean -as indi cated generally at 13, and, as shownain-detail-in Fig.- 5, is; a substantially -Z -shapeda-member formed offiat sheet-metal stock and comprising'a substanatiall-y-rectangmar;deaf-portion: '1 9 which constrwtutes, inefiect-,,arelativelyestiifvleafas-pring adapt ed to:be-assembledsecurely on-thezunderside of the frame 54 by means of the'iaforesaid'assem ply-screw =1 4, the latter extending-up intothe rear end :of -theeframe through i aevertioalaperture formed :at 'the*forward'-=end zoftheleaf spring pore-' tion! 9: ofz-the searecontrol devicesIn-.:orderirtoirprevent pivotal movementfotrtheri lattervfwithfirespectto rtheframe=,:thezfonward ends.

of the leaf-spring I9 is formed with-tupstanding az,,-transyerselyespaeed parallel earsrfi Izadapte'd 'inafter referred toas a sear-stop.

to extend upwardly along opposite sides respecportion 83 for flexing theresilient reach 82. Ex-

tending transversely from opposite edges respectively of the resilientreach 82, intermediate its upper and lower ends, is a pair oflatching-lugs 84, each of which is adapted to lockingly engage in one ofthe notches 63 formed in the corresponding vertical flanges 68 of therear channel 62 of the box-magazine, the latching-lugs 84 serving toreleasably secure the box-magazine in the aperture 66 of the frame 54with the upper end of the box-magazine extending into the bolt-passageI2 of the receiver, for feeding cartridges into cartridge-chamberingposition.

The rear end of the leaf-spring I9 is formed with an integral upstandingreach 85, the upper edge 86 of which constitutes an abutment here- Thelatter is adapted to be located beneath the underside of the sear-arm 34and, more particularly, the underside of the safety-slide 38intermediate its screw 42 and its lip and to be sp ced Ver ly from theunderside of the safety-slide normally a distance such as to permitunrestrained movement of the sear-and-trigger unit when releasing thecocked firing-plunger.

As noted above, if after the firearm is cocked, it should be desired tolock the sear-and-trigger .unit 35 against operation by its finger-piece31,

the clearance-recess 15 thereof. Under these conditions, thesear-and-trigger unit 35 is positively held from pivotal movementclockwise, thereby preventing release of the cocked firing-plunger l8.When the safety-arm 46 is swung forwardly to its off position, thesafety-slide 38 will be retracted, thereby withdrawing its lip 48 fromengagement with the shoulder 81 of the frame 54. Under these conditions,the sear-and-trigger unit is free to be rocked clockwise by pullinrearwardly on the finger-piece 31 against the compression force of thesear-spring 5| to release the cocked firing-plunger I8 and thus eifectfiring of the arm.

In rocking the sear-and-trigger unit clockwise .to release the sear, thesear-arm 34 will swing downwardly until the underside of the sear-arm,and more particularly the safety-slide mounted thereon, is brought intoengagement with the upper edge or abutment 86 of the upstanding reach ofthe relatively-stiff leaf-spring 19. Due to the inherent stifiness ofthis resilient element of the sear-control means, a substantially-normalpull on the finger-piece 31 of the sear-and-trigger unit will beinsuificient to cause the sear-arm to dis- ,place the sear-abutment 86,whereby the latter serves effectively as a positive stop to limitfurther displacement of the sear-arm. On releasing the finger-piece ofthe sear-and-trigger unit, the compressed sear-spring 5| will elevatethe forward end of the sear-arm into the vertical slot 52 of thereceiver for re-engagement of the cookingshoulder 32 of the sear-comb 33with the cookingshoulder 3| of the firing-plunger l8.

'firearm by a single fastening-means.

In order that the action or bolt I4 may not inadvertently slide out ofthe receiver when unlocked therefrom, the sear-comb 33 is provided atits forward upper edge with a shoulder or boltstop 88 adapted normallyto project up into a clearance-aperture 89 formed in the breech-boltintermediate its reduced rear-end portion and its head-portion 90, thebolt-stop 88 being adapted to project up into the path of therearwardly-facing shoulder 9| of the latter, both when the sear is inlooking engagement with the firing-plunger and when the sear-arm hasbeen pulled down into engagement with the sear-stop abutment 86. to firethe arm, as hereinabove described.

Assuming the sear to be in its latter position, then if the breechblockis unlocked and pulled rearwardly, the rearwardly-facing shoulder 9| ofthe head portion 90 of the bolt will bring up against the. bolt-stop 88of the sear-comb 33, which prevents inadvertent removal of thebreech-bolt from thereceiver. However, should it be desired to removethe bolt from the receiver intentionally as, for example, whendisassembling the elements of the firearm, the shooter. may lower thebolt-stop 88 of the sear-comb out of the path of the rearwardly-facingshoulder 8| of the breech-bolt by exerting more than the normal rearwardpull on the finger-piece 31 of the searand-trigger unit, therebypullingthe sear-arm 34 downwardly against the sear-stop abutment 86 withsufiicient force to overcome the resistance of the relatively-stiffleaf-spring 19 to deflect the latter downwardly, as indicated in Fig. 3,whereupon the bolt-stop 88 of the sear-comb will lie below therearwardly-facing shoulder 9| of the bolt-head to permit withdrawal ofthe bolt from the receiver.

From the foregoing it will be seen that by the construction andarrangement of the elements of the sear-control means 18, arelatively-simple, inexpensive, unitary device is provided,incorporating the functions of a sear-stop and box-magazinelatching-memben both of which are of durable constructionand adapted'tobe mounted in operative relationship with other elements of the Further,that when assembled to the underside of the boxmagazine frame; theleaf-spring portion 19 of the sear-stop means extends over the kerfedend of the adjusting-screw H of the sear-spring 5| so as to'hide thescrew and prevent maladjustment of the sear-spring by thoseinexperienced with firearms; and that by forming the sear-stop as aninherent part of a resilient leaf-spring, the searstop abutment isoperable also as a bolt-stop control-means for permitting theintentional removal only of the bolt from the receiver.

' The invention may be carried out in other specific ways than thoseherein set forth without departing from the spirit and essentialcharacteristics of the invention, and the present embodiments are,therefore, to be considered in all respects as illustrative and notrestrictive, and'all changes coming within the meaning and equivalencyrangeof the appended claims are intended to be embraced therein.

I claim:

1. In a firearm, including in combination: a. frame; a spring-pressedfiring-member; a searand-trigger unit arranged to releasably hold saidspring-pressed firing-member in its cocked position and comprising asear, and a finger-piece for operating said sear; a box-magazineengageable in said frame and sear-control means comprising -a resilientmember having a sear-abutment and in said frame; sear-control meanscomprising a resilient member having a sear-abutment and a latch-imeans,said resilient member being arranged normally to support saidsear-abutment in the path of said sear to stopthe displacement of saidsear after disengagement thereof from said cocked spring-pressedfiring-member,and to hold said latch-means in engagement with saidboxmagazine thereby to releasably secure the latter in said frame; andfastening-means arranged to secure said sear-control means to saidframe.

3. In a firearm, including in combination: a frame; a spring-pressedfiring-member; a scarand-trigger unit arranged to releasably hold saidspring-pressed firing-member in its cocked position and comprising ascar, and a finger-piece for operating said sear; a box-magazineengageable incsaid frame; and sear-control means comprising a unitaryleaf -spring member having a sear-abutment at one extremity thereof anda latch-means at the opposite extremity thereof, said leaf-springmember'being arranged normally to support said sear-abutment in the pathof said sear to stop the displacement of said sear after disengagementthereof from said cocked spring-pressed firingmember, and to hold saidlatch-means in engagement with said box-magazine thereby to releasablysecure the latter in said frame.

4. In a firearm, including in combination: a frame; a spring-pressedfiring-member; a searand-trigger unit arranged to releasably hold saidspring-pressed firing-member in its cocked position and comprising asear, and a finger-piece for operating said sear; a box-magazineengageable in said frame; sear-control means comprising a unitaryleaf-spring member having a sear-abutment at one extremity thereof, anda latch-means at the opposite extremity thereof, said leaf -springmember being arranged normally to support said sear-abutment in the pathof said sear to stop the displacement of said sear after disengagementthereof from said cocked spring-pressed firingmember, and to hold saidlatch-means in engage.- ment with said box-magazine thereby toreleasably secure the latter in said frame; and single fastening-meansengageable with said frame and said unitary leaf-spring member to securethe latter to said frame.

5. In a firearm, including in combination: a movable bolt; a frame; aspring-pressed firingmember; a sear-and-trigger unit arranged toreleasably hold said spring-pressed firing-member in its cocked positionand comprising a seararm having a sear and a bolt-stop at one extremitythereof and a finger-piece at the opposite extremity thereof foroperating said sear and said boltstOp; a box-magazine engageable in saidframe; and sear-control means comprising a resilient member having anabutment and a latch-means, said resilient member being arrangednormally to support said abutment opposite said sear-arm to stop thedisplacement of ,said sear-arm after ,dis-

iii)

engagement of said sear from said cocked springpressed firing-memberthereby to retain said bolt-stop in the path of movement of said boltand prevent inadvertent removal thereof from said firearm, saidresilient member being arranged to be flexed by said sear-arm byexertion of an abnormal force on the finger-piece of saidsear-and-trigger unit thereby to displace said bolt-stop from the pathof movement of said bolt to permit intentional removal thereof from saidfirearm, said resilient member being arranged also to hold saidlatch-means in en agement with said box-magazine so as to releasablysecure the latter in said frame.

6. In a firearm, including in combination: a movable bolt; a frame; aspring-pressed firingmember; a sear-and-trigger unit arranged toreleasably hold said spring-pressed firings-member inits cocked positionand comprising a sear.- arm having a sear and a bolt-stop atone'extremity thereof and a finger-piece at the opposite extremitythereof for operating said sear and said bolt-stop; a box-magazineengageable in said frame; and sear-control means comprising a unitaryleaf-spring member having an abutment at one extremity thereof and alatch-means at the opposite extremity thereof, said leaf-spring memherbeing arranged normally to support said abutment opposite said sear-armto stop the displacement of said sear-arm after disengagement of saidsear from said cocked spring-pressed firing-member thereby to retainsaid bolt-stop in the path of movement of said bolt and preventinadvertent removal thereof from said firearm, said leafspring memberbeing arranged to be flexed by said sear-arm by exertion of an abnormalforce on the finger-piece of said sear-and-trigger unit thereby todisplace said bolt-stop from the path of movement of said bolt to permitintentional removal thereof from said firearm, said leaf-spring beingarranged also to hold said latch-means in engagement withsaidbox-magazine so as to releasably secure the latter in said frame.

'7. In a firearm, including in combination: a

" movable bolt; a frame; a spring-pressed firing- -member; asear-and-trigger unit arranged to releasably hold said spring-pressedfiring-member in its cocked position and comprising a sear-arm having asear and a bolt-stop atone extremity thereof and a finger-piece at theopposite extremity thereof for operating said sear and said bolt-stop; abox-magazine engageable in said frame; sear-control means comprising aunitary leaf-spring member having an abutment at one extremity thereofand a latch-means at the opposite extremity thereof, said leaf-springmember being arranged normally to support said abutment opposite saidsear-arm to stop the displacement of said sear-arm after disengagementof said sear from said cocked spring-pressed firing-member thereby toretain said bolt-stop in the path of movement of said bolt and preventin advertent removal thereof from said firearm, said leaf-spring memberbeing arranged to be flexed by said sear-arm by exertion of an abnormalforce 8. In a firearm, including in combination: a frame; aspring-pressed firing-member; a searand-trigger unit arranged toreleasably hold said spring-pressed firing-member in its cocked positionand comprising a sear, and a finger-piece for operating said sear; abox-magazine having a notch therein and engageable in said frame; andsear-control means comprising a unitary leafspring having a firstresilient reach provided with a sear-abutment and a second resilientreach opposite said first resilient reach and provided with alatching-lug, said first resilient reach being arranged normally tosupport said sear-abutment in the path of said sear to stop thedisplacement of said sear after disengagement thereof from said cockedspring-pressed firing member, said second resilient reach being arrangedto releasably hold said latch-lug in the notch of said boxmagazine tosecure said magazine in said frame.

9. In a firearm, including in combination: a frame; a spring-pressedfiring-member; a searand-trigger unit arranged to releasably hold saidspring-pressed firing-member in its cocked position and comprising asear, and a finger-piece for operating said sear; a box-magazine havingnotches therein and engageable in said frame; sear-control meanscomprising a, unitary leafspring having a first resilient reach providedwith a sear-abutment and a second resilient reach opposite said firstresilient reach and provided with latching-lugs, said first resilientreach being arranged normally to support said sear-abutment in the pathof said sear to stop the displacement of said sear after disengagementthereof from said cocked spring-pressed firing-member, said secondresilient reach being arranged to releasably hold said latching-lugs inthe notches of said box-magazine to secure said magazine in said frame;and fastening-means engageable with said frame and said unitaryleaf-spring member intermediate said sear-abutment and said latch- 10ing-lugs to secure said unitary leaf-spring member to said frame.

10. In a firearm, including in combination: a receiver; a bolt movablein said receiver; a frame secured to said receiver; a spring-pressedfiringmember; a sear-and-trigger unit arranged to releasably hold saidspring-pressed firing-member in its cocked position and comprising asear-arm having a sear and a bolt-stop at one extremity thereof and afinger-piece at the opposite extremity thereof for operating said searand said boltstop; a box-magazine having notches therein and engageablein said frame; sear-control means comprising a unitary leaf-springhaving a first resilient reach provided with an abutment and a secondresilient reach in axial alignment with said first resilient reach andprovided with latching-lugs, said first resilient reach being arrangednormally to support said abutment below said sear-arm to stop thedisplacement of said seararm after disengagement of said sear from saidcocked spring-pressed firing-member thereby to retain said bolt-stop inthe path of movement of said bolt and prevent inadvertent removalthereof from said receiver, said first resilient reach being arranged tobe flexed by said sear-arm by exertion of an abnormal force on thefinger-piece of said sear-and-trigger unit thereby to displace saidbolt-stop from the path of movement of said bolt to permit intentionalremoval thereof from said receiver, said second resilient reach beingarranged to releasably hold said latching-lugs in the notches of saidbox-magazine to secure said magazine in said frame; and a singlefasteningmeans engageable with-said frame and said unitary leaf-springintermediate said abutment and said latching-means to secure the unitaryleafspring to said frame.

HARRY L. CROCKETT.

No references cited.

